<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>网页布局</title>
<body>
<div id="container" style="width: 800px">
    <div id="header" style="background-color: #00afd7;height: 30px;">
        <h3>中国南方电网</h3>
    </div>
    <div id="menu" style="background-color: #ff77ff;height: 500px;width: 100px;float: left">
        <b>菜单</b>
            公文检索<br>
            已办<br>
            待办<br>
            新启流程<br>
    </div>
    <div id="content" style="background-color: #0c5460; height: 500px;width: 700px;float: left">
        <strong>正文</strong>
        这是正文内容
    </div>
    <div id="footer" style="background-color: #ff77ff;height: 90px;width: 800px;text-align: center;text-decoration-line: overline">
        youjiahe @ enersun.com
    </div>
</div>
</body>
</html>